PS391

SUBJECT
GROUP
Climate
MODEL
2011~2016MY
Optima Hybrid
(TF HEV)
NUMBER
PS391
DATE
August 2015
OPTIMA HYBRID (TF HEV) WITH DTC B1695 - LOST
COMMUNICATION WITH E-COMP
WARNING
Be sure to remove the hybrid battery safety plug before performing this repair, and
keep the plug in your possession until complete. If not, electric discharge injury may
result from High-Voltage (HV) current.
When addressing a customer concern related to an A/C system not blowing cold air and DTC
B1695 is active in the A/C Control Unit, this could be the result of one, or more, of the following
conditions:
•
•
•
A blown High-Voltage (HV) fuse in the E-Comp 270 volt supply circuit.
A circuit concern between the A/C Control Unit and the E-Comp
A High-Voltage (HV) circuit concern
Begin the diagnosis process by locating the HV E-Comp fuse on the HPCU. The fuse is
located at the rear of the unit just above the 270V input to the HPCU. Once the fuse is
located, remove it and test for continuity across the fuse. If the continuity test reveals an open
circuit, order a replacement fuse. Note – If the fuse is blown, it is likely due to either a
harness or an E-Comp concern. Verify the root cause before replacing the fuse or it will
likely blow again. For additional diagnosis information, refer to the Service Information
on KGIS.
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